1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9e10c8f5d99ee22f953fe09a0dc323a38377744f9e9687389309dea721d3e2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f12fb901-1cdc-4fe0-a537-165ebf09e718.json and https://artists.proofprofile.net/proofs/artist/f12fb901-1cdc-4fe0-a537-165ebf09e718.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2612af4568d2c462cf35b27b4eee76d3598276a7d5c3dc7cabf6bd227472c3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1880150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9d8dbb59e39e7d3a0c73bd408f9a8ceb9ee52ffe27a994b391fb5ef6104dd7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QME2N1353123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e888f9615cf9185f4b5bba9231b48773b841d4918d50f98ae7c80121d33f0cb. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QME2N1353121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6444bb71c5d0295a579d73578fe1cfb175469a87c3163038fa4e6282db0b68e1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QME2N1353130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e743a96afe0ee7447eaed953eb1c011a47fc7eceef545c4f5e2e09bcdc5cf5b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH1536369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be9c0321b9366a26fc2f62dea0bbbfa17867d9c9cf656202d2e83e683b4d4a8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41865849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37ed151a955353ba13724391ad30e2d3c0071a7093c159bda42736e8f6fd3ab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21854459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ace53c0a084ae8ca4b0e737b9cb6d1d878267c12d5b0e743ad0d19e7a2e4fa8. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:02:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ51919362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56eef898d541d38b16a9d7665479bdccd517c9db3a3501066fa719502032380. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEH1925389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760051bcc771065fe52b398c1fa4fe8dc009002e34829c6f910f78f14353ce30. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1827346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f129fbf8de1cbc251f0ed295466d6dd4291e66b1f6f5445f6504ea1dc1fd40. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADT1891095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ff7ff73b635245d58368ba990912939c7c32e98d694f57c999e526c53646b6. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QME2N1353136.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21ecf7fdbfa82fe4b1dccdaf33477ff444b47fb74ca8cbf87f96c4a7c44561c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH1536381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d4c1d2f30c5a90b5ab55c22f24801ec05321a4b2fe43ca7f93b1b3c14bc11f. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41801623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42cb44af65eae19518de2481fbf5ae1ffc9edb23ad4484af252194d7bc6bbe2. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21833563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dc2fd36102d535cf757abff60a8e15e256b9d365e950e0897d65c4fbffb377. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2087880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9556b0ee3a32200dadcae17b0046811c284eb5baeadb19a3b2994790c16064e0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QME2N1353147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dabb3a5d5307a6a8fc8a0df8d8d61b42ffc0a66886a04510d0cd4579f9d6fb. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QME2N1353146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20715f9adb96a2149956f45fb45751972f6dc581fa6cc666983626d1f9e66cb. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41538911.